231313210321 has 4 divisors (see below), whose sum is σ = 231363467632. Its totient is φ = 231262953012.

The previous prime is 231313210243. The next prime is 231313210339. The reversal of 231313210321 is 123012313132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231313210321 - 2²⁵ = 231279655889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231313210292 and 231313210301.

It is not an unprimeable number, because it can be changed into a prime (231313210391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25121751 + ... + 25130956.

It is an arithmetic number, because the mean of its divisors is an integer number (57840866908).

Almost surely, 2^231313210321 is an apocalyptic number.

It is an amenable number.

231313210321 is a deficient number, since it is larger than the sum of its proper divisors (50257311).

231313210321 is an equidigital number, since it uses as much as digits as its factorization.

231313210321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50257310.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 231313210321 its reverse (123012313132), we get a palindrome (354325523453).

The spelling of 231313210321 in words is "two hundred thirty-one billion, three hundred thirteen million, two hundred ten thousand, three hundred twenty-one".